Results 21 to 30 of about 84,921 (218)

Testing loop quantum cosmology [PDF]

, 2017
Loop quantum cosmology predicts that quantum gravity effects resolve the big-bang singularity and replace it by a cosmic bounce. Furthermore, loop quantum cosmology can also modify the form of primordial cosmological perturbations, for example by ...
Wilson-Ewing, Edward
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Loop Representation of Quantum Gravity

Annales Henri Poincaré, 2023
A hyperlink is a finite set of non-intersecting simple closed curves in $\mathbb{R}^4 \equiv \mathbb{R} \times \mathbb{R}^3$, each curve is either a matter or geometric loop. We consider an equivalence class of such hyperlinks, up to time-like isotopy, preserving time-ordering.
openaire   +3 more sources

Loop-Quantum-Gravity Vertex Amplitude [PDF]

Physical Review Letters, 2007
Spinfoam theories are hoped to provide the dynamics of non-perturbative loop quantum gravity. But a number of their features remain elusive. The best studied one -the euclidean Barrett-Crane model- does not have the boundary state space needed for this, and there are recent indications that, consequently, it may fail to yield the correct low-energy $n$-
Engle, Jonathan, Pereira, Roberto, Rovelli, Carlo   +2 more
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Loop quantum gravity and cosmological constant

Physics Letters B, 2021
A one-parameter regularization freedom of the Hamiltonian constraint for loop quantum gravity is analyzed. The corresponding spatially flat, homogenous and isotropic model includes the two well-known models of loop quantum cosmology as special cases. The
Xiangdong Zhang, Gaoping Long, Yongge Ma
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Extended loop representation of quantum gravity [PDF]

Physical Review D, 1995
27 pages, report IFFC/94 ...
Di Bartolo, C., Gambini, R., Griego, J.
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Testing the Master Constraint Programme for Loop Quantum Gravity V. Interacting Field Theories [PDF]

, 2004
This is the final fifth paper in our series of five in which we test the Master Constraint Programme for solving the Hamiltonian constraint in Loop Quantum Gravity.
Ashtekar A, Ashtekar A, Ashtekar A, B Dittrich, Brunnemann J Thiemann T, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Gel'fand I M, Giulini D, Giulini D, Kempf A, Klauder J, Marsden J E, Okolow A Lewandowski J, Reed M, Rovelli C, Rovelli C, Sahlmann H, Sahlmann H, Sahlmann H, Sahlmann H, Sahlmann H Thiemann T, Sahlmann H Thiemann T, Smolin L, T Thiemann, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T   +43 more
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Emergence of string-like physics from Lorentz invariance in loop quantum gravity [PDF]

, 2014
We consider a quantum field theory on a spherically symmetric quantum space time described by loop quantum gravity. The spin network description of space time in such a theory leads to equations for the quantum field that are discrete.
Gambini, Rodolfo, Pullin, Jorge
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Prelude to Simulations of Loop Quantum Gravity on Adiabatic Quantum Computers

Frontiers in Astronomy and Space Sciences, 2021
The article addresses the possibility of implementing spin network states, used in the loop quantum gravity approach to Planck scale physics on an adiabatic quantum computer.
Jakub Mielczarek
doaj   +1 more source

Loop Quantum Gravity [PDF]

, 1997
The problem of finding the quantum theory of the gravitational field, and thus understanding what is quantum spacetime, is still open. One of the most active of the current approaches is loop quantum gravity. Loop quantum gravity is a mathematically well-
A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Connes, A Connes, A Guichardet, A Higuchi, A Sen, A Strominger, AP Balachandran, AP Balachandran, AP Yutsin, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, C Bartolo Di, C Bartolo Di, C Bartolo Di, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, CJ Isham, CJ Isham, CJ Isham, CJ Isham, CJ Isham, CJ Isham, D Amati, D Amati, D Amati, D Amati, D Marolf, D Marolf, D Marolf, D Marolf, D Marolf, DM Brink, E Witten, F Barbero, F Barbero, F Barbero, F Barbero, G Hooft ’t, G Horowitz, G Horowitz, G Horowitz, G Immirzi, H Kodama, H Verlinde, HA Morales-Técotl, HA Morales-Técotl, J Hartle, J Hartle, J Hartle, J Iwasaki, J Iwasaki, J Iwasaki, J Lewandowski, J Lewandowski, J Lewandowski, J Pullin, J Zegwaard, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JD Bekenstein, JW York, K Krasnov, K Krasnov, K Krasnov, K Krasnov, K Wilson, L Crane, L Crane, L Crane, L Crane, L Smolin, L Smolin, L Smolin, LH Kauffman, LH Kauffman, M Agishtein, M Barreira, M Reisenberger, M Reisenberger, MP Blencowe, N Grot, P Citanovi`c, R Borissov, R Borissov, R Borissov, R DePietri, R DePietri, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Loll, R Loll, R Loll, R Penrose, R Penrose, R Penrose, R Penrose, RM Wald, S Carlip, S Carlip, S Carlip, S Catterall, S Fritelli, S Frittelli, S Frittelli, S Frittelli, S Hawking, S Hawking, SW Hawking, T Jacobson, T Thiemann, T Thiemann, TJ Foxon, V Husain, V Husain   +172 more
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Loop Quantum Gravity and Observations [PDF]

, 2017
Quantum gravity has long been thought to be completely decoupled from experiments or observations. Although it is true that smoking guns are still missing, there are now serious hopes that quantum gravity phenomena might be tested. We review here some possible ways to observe loop quantum gravity effects either in the framework of cosmology or in ...
Barrau, A., Grain, J.
openaire   +2 more sources